Here is an attempt to show how a circulation may evolve over time and become stronger and tighter (increasing rotation rate) however the single radar AzShear does not help the user identify the increase in shear rates. The merged product AzShear was even more nondescript with its weaker appearance of the circulation.

It would be helpful to have some way to better visualize the change in shear over time in the AzShear products, either with a trend line or a different color curve.

When we are making warn/don’t warn decisions, changes of just a few kts rotation velocity may tip the scales, the AzShear product as it is now does not provide the resolution/detail for these changes.

SRM – 2122, 2124, 2126, 2128 UTC

KMXX AzShear (Top), Merged AzShear (Bottom) – 2122, 2124, 2126, 2128

— SCoulomb